[linux-lvm] Re: brainfart: lilo'd a PV
Ray Morris
support at bettercgi.com
Fri Dec 18 03:31:58 UTC 2009
> > Yes. The area begin with "LABELONE" is PV label,
>
> Looks like the LVM developers foresaw my brainfart and left the first
> sector of the disk for me to bugger up without buggering up LVM. :-)
Applause.
--
Ray Morris
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On 12/17/2009 08:03:08 PM, Brian J. Murrell wrote:
> On Thu, 2009-12-17 at 19:48 -0500, Takahiro Yasui wrote:
> >
> > Yes. The area begin with "LABELONE" is PV label,
>
> Looks like the LVM developers foresaw my brainfart and left the first
> sector of the disk for me to bugger up without buggering up LVM. :-)
>
> > which is recorded in
> > the first sector by default.
>
> Hrm. Do you really mean "first" there or second, which is sector 1 if
> you start counting with 0?
>
> > This is the description from the pvcreate
> > man page.
> >
> > --labelsector sector
> > By default the PV is labelled with an LVM2
> identifier in its
> > second sector (sector 1).
>
> Yes, this looks so.
>
> > This lets you use a different sector
> > near the start of the disk (between 0 and 3
> inclusive - see
> > LABEL_SCAN_SECTORS in the source). Use with care.
>
> > You don't have any problem on the PV, do you?
>
> I don't think I do:
>
> # pvdisplay /dev/sda
> --- Physical volume ---
> PV Name /dev/sda
> VG Name datavol
> PV Size 931.51 GB / not usable 1.71 MB
> Allocatable yes
> PE Size (KByte) 4096
> Total PE 238467
> Free PE 85356
> Allocated PE 153111
> PV UUID C22uVB-4m26-5cvl-I11V-NXCm-mVNo-UTAXUH
>
> But of course, I just want to get the opinion of the experts.
>
> > I don't think you need something to repair the PV.
>
> I don't think so either, but of course, do want to confirm my
> suspicion.
>
> Thanx much for your insight.
>
> b.
>
>
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